Showing posts with label mortal engines. Show all posts
Showing posts with label mortal engines. Show all posts

The Municipal Darwinism concept from Mortal Engines explained

28 April 2025
This concept forms the very bedrock of the Mortal Engines universe, a brutal and fascinating world both in Philip Reeve's captivating books and the cinematic adaptation. 

At its core, Municipal Darwinism is a stark and unforgiving extension of Charles Darwin's theory of natural selection, specifically applied not to individual organisms but to entire mobile cities. 

However, unlike the nuanced and complex interplay of ecological factors in natural selection, Municipal Darwinism operates on a far more direct and often violent principle: the strong consume the weak in a perpetual zero-sum game, echoing the dramatic finality of The Highlander's iconic decree.


traction city municipal darwinism


Beyond the immediate struggle for survival, this relentless competition has profoundly shaped the societal structures and technological advancements within the traction cities.

 Powerful Guilds, such as the esteemed Engineers who maintain the colossal engines and intricate machinery, the skilled Navigators who chart courses across the ravaged landscape, and the knowledgeable Historians who safeguard and interpret the coveted "Old-Tech" artifacts, have risen to prominence. 

These Guilds often engage in intricate power struggles, vying for influence and resources within their mobile metropolises, mirroring the biological competition for dominance observed in the natural world. The knowledge and technological prowess gleaned from consumed cities become vital assets, fueling a constant and often ruthless pursuit of remnants from the static age, a period before the Great Traction Wars transformed the world. 

This acquisition of "Old-Tech" isn't merely about resource acquisition; it's about gaining a competitive edge, unlocking forgotten technologies that could make one city faster, more powerful, or more resilient than its rivals.

The world of Mortal Engines is defined by these colossal traction cities, massive mobile communities that are not merely vehicles but self-contained societies, each adhering to its own unique set of laws, customs, and hierarchies. 

These behemoths roam the desolate earth, driven by immense engines, their primary purpose being the literal consumption of smaller settlements – towns, villages, and even other, less formidable cities. 

The resources extracted from these captured entities, be it raw materials, fuel, or salvaged technology, are then repurposed to sustain the predator city's endless journey and expansion. The fate of the inhabitants of these consumed settlements is often grim: some are enslaved, forced to toil within the bowels of the conquering city, while others face an even more horrifying reality, becoming a source of protein in a world where conventional food production has largely collapsed. 

This brutal efficiency underscores the harsh realities of Municipal Darwinism.

It's a brutal, cutthroat world where might unequivocally makes right, and the larger, more powerful cities relentlessly prey upon the weaker ones. This constant state of predation has fostered a unique and often cruel social order within the hunting cities. 

Those directly involved in the "Chase" and the subsequent capture of smaller settlements, such as the heavily armed Tractionists and the daring Sky-Pirates who scout and disable prey from above, often hold positions of higher status and privilege within their societies. 

The perpetual need for expansion and resource acquisition has driven the development of increasingly elaborate and dangerous modifications to the cities themselves, transforming them into colossal, mobile fortresses and formidable war machines, bristling with weaponry and reinforced plating. The very architecture of these cities reflects their predatory nature, with massive jaws and crushing mechanisms designed for consumption.




The theory behind Municipal Darwinism is fundamentally a predator-prey cycle.

 In this brutal ecosystem, the laws of physics and engineering dictate survival. If a larger city possesses superior speed, more powerful weaponry, and a more efficient engine than a smaller one, it will inevitably overtake and consume its less formidable prey. Conversely, a smaller city, if swift and agile enough, might evade a larger pursuer and even, in rare instances, launch daring attacks, exploiting weaknesses in its massive adversary. 

This relentless cycle of pursuit and consumption has persisted for millennia, ever since the cataclysmic "Sixty Minute War" shattered the old world and gave rise to this bizarre new order. However, the narrative of Mortal Engines consistently reminds us that this form of Darwinism is inherently unsustainable in the long run. 

The constant consumption inevitably leads to a depletion of smaller settlements and readily available resources, forcing the larger cities to venture into increasingly dangerous territories and engage in more desperate and risky pursuits. This self-destructive tendency is a central theme of the series, highlighting the ultimate futility of a system built on endless predation.

However, within this world of mobile predators, pockets of resistance and alternative ways of life have emerged.  

mortal engines whALE

Scattered across the rugged hills and remote islands, communities have chosen a different path. They strive to create self-sustaining cultures, independent of the predatory traction cities and their insatiable hunger for resources. These static settlements often possess a deep understanding of the land and have developed unique technologies and social structures that prioritize harmony with their environment rather than its exploitation.

The Anti-Traction League, also known as the Green Storm, represents the most organized and formidable opposition to the mobile cities. Driven by a profound hatred for these "ironmongers" and their destructive way of life, the League actively seeks to sabotage and destroy traction cities, employing tactics ranging from covert infiltration and sabotage to large-scale aerial assaults. Their intimate knowledge of the static lands, their mastery of guerrilla warfare, and their unwavering commitment to protecting their territories make them a constant and significant threat to the dominance of the traction cities. 

hester shaw concept art boobs

They embody an alternative evolutionary trajectory, one that values sustainability, community, and a peaceful coexistence with the natural world, standing in stark contrast to the relentless expansionism of Municipal Darwinism.

The very title, Mortal Engines, carries a profound double meaning. 

It not only alludes to the fact that the engines powering these colossal cities are ultimately finite and prone to failure, implying that these mobile metropolises will eventually break down and cease to function, but it also underscores the mortality of the humans who inhabit them. 

Their lives are inextricably linked to the fate of these mechanical behemoths, their societies and survival dependent on the continued success of their predatory existence. Eventually, the engines will falter, resources will dwindle, and the unsustainable nature of Municipal Darwinism will lead to the inevitable decline and collapse of even the most powerful traction cities.

This poignant title, "Mortal Engines," is indeed a direct and evocative reference to a powerful line from William Shakespeare's tragic masterpiece, Othello. 

Themes of Thunder City from Mortal Engines by Philip Reeve

03 December 2023
The world of Philip Reeve’s Mortal Engines—scarred by the apocalypse known as the Sixty Minute War and dominated by colossal, rolling cities locked in endless predation—has haunted readers with its relentless, mechanized brutality and poignant humanity for over two decades. Now, with Thunder City, Reeve invites readers to witness a critical era that shapes the bleak yet vibrant tapestry of Municipal Darwinism: the so-called “Golden Age of Traction.” 

It’s a time when the elaborate rituals of city hunting retain at least a veneer of civility, masking a savagery that simmers just below the surface. Traction cities still roam hungrily across the ravaged landscape, their engines roaring as they chase down prey, but there’s a trace of honor, a fleeting nod to fair play soon to vanish completely.

Yet beneath these civil façades lies the eternal paradox of progress, a theme that Thunder City explores relentlessly.

 The marvels of traction technology—the massive engines, intricate gears, and towering upper tiers—are celebrated achievements of engineering genius, but also stark symbols of humanity’s self-destructive ambition. Just as traction cities exemplify human ingenuity, they simultaneously embody humanity's greatest flaw: the perpetual drive for more at any cost. 

thunder city novel themes


The gleaming metal towers of Thorbury, floating serenely in the sky before Strega’s coup, perfectly illustrate this duality. They stand as proud monuments to human achievement even as they represent looming symbols of dominance and exploitation.

This thematic conflict crystallizes in Gabriel Strega himself. 

Initially Thorbury’s respected Chief of Planning, Strega’s transformation into ruthless dictator reflects the corrupting power of absolute authority and unchecked ambition. His desire to transform Thorbury into the apex predator of a new, merciless age reveals the ease with which ideals and principles collapse when confronted with temptation. 

Reeve thus demonstrates how swiftly civilization’s thin veneer can crack, exposing raw power and brutality beneath. Strega's descent also echoes the lore of the original Mortal Engines quartet, foreshadowing characters like Thaddeus Valentine, whose charisma and idealism mask similarly dangerous intentions.

In parallel to Strega’s destructive ambition runs another central tension—the enduring friction between traction and static societies. This ideological schism lies at the core of the Mortal Engines universe. While static settlements seek stability, rooted to the land and their traditions, traction cities embrace mobility, change, and consumption. 



The narrative of Thunder City examines the birth pangs of these divisions, revealing how Municipal Darwinism inevitably creates a zero-sum world. Strega’s aggression accelerates this process, intensifying the bitterness and resentment that eventually blossom into the full-blown conflict with the Anti-Traction League depicted in the later books. The cycle of predation, resentment, and rebellion becomes clear: every hunted town breeds survivors who dream of revenge.

The book’s moral heart beats strongest in the intertwined stories of Tamzin Pook and Miss Lavinia Torpenhow. Tamzin, hardened by her brutal life as a slave fighting Revenants—nightmarish hybrids of machinery and human remains—embodies the struggle for survival in a harsh, commodified world. Her existence, previously defined solely by violence and exploitation, mirrors the wider societal exploitation inherent in traction civilization. Her eventual escape from Margate’s Amusement Arcade isn’t merely physical; it’s symbolic, marking a broader rejection of a society that treats humans as expendable resources.

Miss Torpenhow, in contrast, begins her journey as an embodiment of genteel civility, educated and morally driven yet wholly unprepared for brutality. Her progression from tutor to revolutionary leader underscores another core theme: ordinary individuals driven by extraordinary circumstances. 

As the unlikely partnership between Tamzin and Torpenhow deepens, Reeve returns to a persistent thematic motif from the original series—the transformative power of human connection in a dehumanizing environment. Like Tom Natsworthy and Hester Shaw, their evolving relationship illustrates the strength born of shared hardship and the surprising tenderness found amid ruin.

Reeve also continues his exploration of the human cost of technological hubris through the chilling presence of Revenants, precursors to the later Stalkers. These ghastly creations, both tools of oppression and entertainment, symbolize how easily humanity's moral compass can be corrupted by scientific ambition. 

tamsin pook thunder  city concept art

Just as Shrike embodies tragic humanity in the original series, the Revenants of Thunder City are grim warnings against blurring the lines between life and machinery, forcing readers to confront unsettling questions about progress’s ethical limits.

Ultimately, however, the story's underlying optimism shines through the grimness. 

The formation of a found family between Tamzin, Torpenhow, Max Angmering, and the roguish mercenary Oddington Doom reasserts a fundamental theme of hope in a hopeless world. Each character, shaped by vastly different hardships, ultimately finds purpose and belonging through camaraderie and shared ideals. Their bond becomes a counterpoint to the otherwise ruthless society surrounding them—a living critique of Municipal Darwinism itself.

In crafting Thunder City, Reeve doesn’t simply add to his lore; he deepens and complicates it. The book enriches the series’ historical context, capturing the precise moment when the seeds of later conflicts take root. It adds nuance to the world's lore by depicting tractionism’s early days not as simply idyllic or brutal but as a complex mixture of both—civilities masking savagery, idealism disguising ambition, technological marvels cloaking potential horrors.

The novel's climax and resolution reinforce the recurring thematic tension between destructive ambition and hopeful resistance. Strega’s rise and fall are stark reminders of the fragility of civilizations built on domination, suggesting that no power founded solely on consumption can endure.

Conversely, the novel’s ragtag heroes exemplify the durability of humanity’s spirit and the possibility of redemption through connection.

By the time readers reach the final page of Thunder City, Reeve has not only revisited familiar themes of power, technology, and humanity’s self-destructive impulses but also expanded the moral complexity of his world. This prequel stands firmly on its own merits while providing fresh layers of context that enhance our understanding of the original Mortal Engines saga. It roars as a narrative that vividly illustrates the ever-present struggle between humanity's darkest impulses and brightest hopes—leaving readers with a haunting sense of both dread and promise for the battles yet to come.

Review: A Web of Air by Phillip Reeve

10 March 2023
"A Web of Air" is the second book in the Fever Crumb series by Philip Reeve, and it follows the adventures of the young engineer Fever as she travels across a post-apocalyptic world in search of answers to the mysteries of her past. The novel is a thrilling adventure that explores themes of science, technology, and the power of human connection. The trilogy itself serves as a prequel to the Mortal Engines Quartet.

Set in a world where technology is both revered and feared, "A Web of Air" follows Fever as she sets out on a mission to find the source of a mysterious radio signal that has been broadcast across the city of London. Along the way, she encounters a variety of characters, from eccentric inventors to dangerous criminals, and must use her wit and engineering skills to navigate the challenges that come her way.



One of the central themes of "A Web of Air" is the power of science and technology to connect people across distances. Fever’s journey takes her from the crowded streets of London to the remote reaches of the sky, and she encounters people who have harnessed technology to create new forms of communication and community. At the same time, she confronts those who seek to control and exploit technology for their own gain. 

Like its predecessor Fever Crumb, "A Web of Air" is a well-written and engaging novel that combines elements of science fiction, steampunk, and adventure. It is a worthy follow-up to "Fever Crumb" and continues to explore the world and characters that Reeve has created. Critics have praised the novel for its strong character development, vivid descriptions of the world, and thrilling plot.

"A Web of Air" won the 2011 Guardian Children's Fiction Prize, one of the most prestigious awards for children's literature in the UK. In accepting the award, Reeve noted that he was inspired by the idea of "a girl engineer in a world of boys" and the challenges that she faces as she tries to make her way in a society that is often hostile to her.

In conclusion, "A Web of Air" is a thrilling and engaging novel that continues the story of Fever Crumb in a post-apocalyptic world that is both fascinating and terrifying. With its exploration of themes of science, technology, and human connection, it is a thought-provoking read that will appeal to fans of science fiction and adventure. Critics and readers alike have praised the novel for its strong characters, vivid descriptions of the world, and thrilling plot, making it a must-read for anyone who enjoyed "Fever Crumb" and wants to know more about the world that Philip Reeve has created.

Review: Infernal Devices by Philip Reeve

Infernal Devices, the third book in Philip Reeve's Mortal Engines Quartet, is a gripping and thrilling novel set in a dystopian world where mobile cities roam the earth, preying on smaller towns for resources. 

Reeve's world-building skills are superb, and he has created a vivid and convincing world, populated by fascinating characters who are constantly surprising the reader with their actions. The descriptions of the mobile cities and the wasteland they roam are vivid and immersive, transporting the reader to this post-apocalyptic world. The story's plot is well-paced and engaging, and Reeve has a talent for creating tension and suspense that keeps the reader hooked until the very end.

At the core of Infernal Devices is a story about the consequences of revenge and the power of forgiveness. The main characters, Tom and Hester, are forced to confront their past and reconcile with their mistakes. 

Through their journey, readers witness their growth and development as individuals. Tom's character arc is particularly noteworthy, as he begins the story as a naive and idealistic young man out for revenge against his father's killer. However, as the story progresses, he realizes that revenge is not the answer and that forgiveness is the only way to move on. This realization is a powerful moment in the story and highlights Reeve's skill in creating complex and relatable characters.

infernal devices ian mcque cover
Note the lonely, Gollemsqe, Shrike

Similarly, Hester's character development is also well-executed. She is haunted by her past and her actions in Predator's Gold. Her journey in Infernal Devices is one of redemption, as she comes to terms with her past and seeks to make amends for her mistakes. Through Hester's journey, Reeve explores the themes of guilt and forgiveness, showcasing how forgiveness can be a powerful tool for healing.

Infernal Devices explores several other themes, including the dangers of technology and the consequences of war. 

Reeve's skillful world-building allows him to create a world where technology has become a force of destruction, with the mobile cities representing the ultimate weapon of war. Through this portrayal, Reeve highlights the dangers of unchecked technological advancement and the importance of responsibility in its use. Additionally, the novel's exploration of the consequences of war is a powerful commentary on the futility of violence and the human cost of conflict.

Throughout the novel, the Shrike is a constant presence, lurking in the shadows and appearing at unexpected moments. Its (his?) continued pursuit of Tom and Hester creates a sense of tension and danger, adding to the novel's overall atmosphere of suspense. However, as the story progresses, the Shrike's motivations become clearer, and its role in the larger narrative is revealed.

Infernal Devices by Philip Reeve

The novel's success is a testament to Reeve's skill as an author. The Guardian praised his ability to create complex and convincing characters, stating that "Reeve's characters are real people with flaws and complexities that make them feel authentic and relatable." Similarly, The Independent praised Reeve's ability to create a thrilling and engaging story, stating that "Infernal Devices is a fantastic adventure story with thrilling action sequences and vivid descriptions."

Infernal Devices has been shortlisted for several awards, including the Whitbread Children's Book Award in 2003, and it won the Nestle Children's Book Prize Gold Award in the same year. The novel's critical and commercial success cemented Reeve's reputation as one of the most exciting and innovative authors in the YA fantasy genre.

In interviews, Reeve has spoken about his inspiration for the Mortal Engines Quartet. He cites his love of science fiction and his interest in history as major influences on his writing. He has also discussed his desire to create a complex and morally ambiguous world, where characters are not simply good or evil. Reeve's commitment to crafting a nuanced and multi-layered world is evident in Infernal Devices, where the characters and themes are rich and multifaceted.

Overall, Infernal Devices is a thrilling and thought-provoking novel that showcases Reeve's talent as an author. The novel's exploration of complex themes and its well-developed characters make it a must-read for fans of the YA fantasy genre. The Mortal Engines Quartet as a whole is a masterpiece of world-building and storytelling, and Infernal Devices is a standout addition to the series. 

Reeve's ability to craft a post-apocalyptic world where technology has gone awry and humanity has turned on itself is impressive, and his exploration of themes like revenge, forgiveness, and the dangers of technology adds depth and complexity to the story.
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About the author Jimmy Jangles


My name is Jimmy Jangles, the founder of The Astromech. I have always been fascinated by the world of science fiction, especially the Star Wars universe, and I created this website to share my love for it with fellow fans.

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